Paving material and method of making the same



haw-mun P ea Aug. 25, 1925.

uampj STATES PATENTQ FFICE;

Y DANIEL voonnns snoweoosn, or NEVADA, MISSOUBI.

PA ING MATERIAL AND METHOD or MAKING THE samu- No Drawing. Application fi led' October 1c. 3522, sriarno. 593,629. Bencwe fJgnuary 22, 19-25.

.ooosn, a citizen of the United States. re-

siding at Nevada. in the county of Vernon and State of Missouri. have invented a new 5 and usetul larmg Material and M thod of Making the Same, of which the following is a specification. v This invention relates to a new and improred paring material and to a method oi" In some portions of the United States and more especiall 1n the making the'same.

State of lllissouri can he found large deposits of a material known as asphalt sand rock or asphalt lime rock. Owing to thep'eculiar greasy nature of the material it has not. been possible,heretofore, to utilize it for any useful urpose. Attempts have been niade to emp 0y the material in road lmilding but because of the ahsence of a binder suitablefor holding together the rock particles, such attempts have been unsuccessful. It has been well recogn zed that the material in question would constitute an proyide a. road material which will cling" t-otne soil on whichit is placed whether this excellent base'for aroad building composition but. in the absence of abinder exper ments have not resulted successfully.

One of the objects of the present invention is. to so treat the material that a suitable binder can he mixed therewith and the resultant product used either in brick forr'n for road building or in sheet form. the road thus. constructed being able to withstand the heaviestloads, and being unaffected by atmospheric or climatic 'changeswith' the result that llJWlllnot crack, warp, or become otherwise distorted, A further object is to soil be of'a sandy or other nature.

'ith the foregoing and other objects in 'iew theinvent on consists in certain steps in the'method hereinafter pointed out and in certain novel" combinations of parts pointed out in the following description and claim.

therein and consisting of gasoline, kerosene and lubricating: oils, will be separated from the sand. the residue be'ng in the form of an asphalt or heavy hydrocarbon and sand,

A hard asphalt is prepared by heatingheavy hlack'crude oil thereby to eva orate the lighter oils and to leave a resi he of asphalt which is neither brittle nor sticky.

Asphalt sand after being treated by heat as herein described is heated in an open vat or other container and the hard asphalt. prepared by thetreatinentzof crude oil-is added thereto "in the "proportion of one part hard asphalt to from fire to ten parts of asphalt sand. theexact proportions depending upon the hardness of the prodnot called for in thespecifications. In

practice the greater the proportionfof as phalt to asphalt sand the harder will hethe resultant material provided the parts are lcept withi'nfthe proportions above mentioned. After the mixture has been, heated i'rihe open container and stirred thoroughly it isready for use. It can be molded into bricks to be laid in the formation of pave; ments or roads or it can be molded into large blocks to be subsequently melted and put down asa sheet on a" roadway. In practice it has been found that the material thus produced will not soften or melt underthe action of the suns rays. Nor will a pavement of this material crack. warp or 'ctherwise become distorted tliroi1gh"irpan--.

sion or contraction.

\Vhat is'zclaimed, is

\ The herein described method of 'preparf :ing' paving material which consists in reqnently mixing the treated rock with hard asphalt while subjected tothe action of heat, in theproportmns of one" part of hard ducing, asphalt rock toapnlrerized state, heating the same to remove therefrom thehght. oils contained therein.,' and: subseasphalttofrom five to ten parts of treated.

pulverizedrock. a

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature; I I I DANIEL vooRHEs sNoWGoosE. 

